fixed Draft_76 NullPointerException

Author: Davidiusdadi

src/net/tootallnate/websocket/drafts/Draft_76.java

@@ -156,8 +156,14 @@ public HandshakeBuilder postProcessHandshakeResponseAsServer( Handshakedata requ
 	public Handshakedata translateHandshake( ByteBuffer buf ) throws InvalidHandshakeException {
 		HandshakeBuilder bui = translateHandshakeHttp( buf );
 		ByteBuffer key3buf = readLine( buf );
-		byte[] key3 = new byte[ key3buf.remaining() ];
-		key3buf.get( key3 );
+		byte[] key3;
+		if( key3buf == null ){
+			key3 = new byte[0];
+		}
+		else{
+			key3 = new byte[ key3buf.remaining() ];
+			key3buf.get( key3 );
+		}
 		// key3 have to be 16 bytes long
 		bui.setContent( key3 );
 		return bui;